<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<div style="width: 100px;height: 100px;">11111111</div>       <!-- 块级元素 -->
		<span style="width: 100px;height: 100px;">1</span>  <!-- 行内元素无法设置宽高 -->
		<span>2</span>
		<span>3</span>
	</body>
</html>
